The Lord's counsel and instruction to the Seventy: Christ instructed them to be calm and be humble. He told them that it would be a hard duty to teach and administer. They should enter calmly and be serviceable to those they enter into. He told them to take nothing with them, possibly to help them to rely on the Lord and also so they couldn't be robbed. If they are accepted into a house and fed they should eat and also heal sick. If a city turns them away they should cry repentance to those people. He told them that they are blessed to hear and see so many great things.
Articles of Faith 1:6 "We believe in the same organization that existed in the primitive church..." In our day we also have quorums of seventy and are really quiet few in number among the world. This gospel and church is the same that was on the Earth in Christ's day. We have a system in the church that is divinely appointed so that all are looked after and are visited from priesthood holders that can bless the sick. We know that the Lord is on our side if we have faith and are steadfast. The gospel of Christ will stand strong and Satan will not win the battle.
The office of "seventy" in the Priesthood: In the priesthood there is order brought down from Heavenly Father and Jesus Christ. The Seventy is an office that branches down to reach all members of the gospel to be watched over by direction of the Prophet.